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Reflective Photosensors (Photo Reflectors)

CNZ2253 (ON2253)

Reflective Photosensor

Overview

CNZ2253 is a photosensor detecting the change of reflective light

in which a high efficiency GaAs infrared light emitting diode is used

as the light emitting element, and a high sensitivity Si Darlington

phototransistor is used as the light detecting element. The two

elements are located parallel in the same direction and objects are

detected when passing in front of the device.

Features

High sensitivity

Small size and light weight

ø2.2

±0.2

Mark for indicating

LED side

10.6

±0.3

9.6

±0.3

7.5

±0.2

(3.2)

(7.2)

2

3

14

ø0.3

±0.05

*2-0.9

±0.15

ø0.45

±0.05

Unit : mm

Pin connection

14

3

2

(Note)

1. (

) Dimension is reference

2. * is dimension at the root of leads

1.0 mW/˚C at Ta

≥ 25˚C.

1.34 mW/˚C at Ta

≥ 25˚C.

10%

90%

*

(Ambient light is shut off completely)

d = 3 mm

Standard white paper

(Reflective ratio 90%)

Absolute Maximum Ratings (Ta = 25˚C)

Parameter

Symbol Ratings

Unit

Input (Light

Reverse voltage (DC)

3V

emitting diode)

Forward current (DC)

50

mA

Power dissipation

75

mW

Collector to emitter voltage

20

V

Output (Photo Emitter to collector voltage

5V

transistor)

Collector current

30

mA

Collector power dissipation

100

mW

Temperature

Operating ambient temperature

–25 to +85

˚C

Storage temperature

˚C

Electrical Characteristics (Ta = 25˚C)

Parameter

Symbol

Conditions

min

typ

max

Unit

Input

Forward voltage (DC)

1.2

1.5

V

characteristics

Reverse current (DC)

10

µA

Capacitance between terminals

50

pF

Output characteristics Collector cutoff current

0.5

µA

Transfer

Collector current

330

mA

characteristics

Response time

150

µs

1.5

V

from 10% to 90% of its final value.

from 90% to 10% of its initial value.

Applications

Detection of paper, film and cloth

Optical mark reading

Detection of position and edge

Detection of coin and bill

Start, end mark detection of magnetic tape

Class

Q

R

S

3 to 9

6 to 18

12 to 30

Note) The part number in the parenthesis shows conventional part number.